Book Reviews : Sewage Treatment: basic principles and trends,by Ronald Lomax Bolton,A.M.C.T.,M.R.S.H.,M.INST.S.P.,M.I.P.H.E.,and Louis Klein,M.SC.,PH.D. (LOND),F.R.I.C.,M.INST.S.P. 161 pp. BUTTERWORTH AND CO. (PUBLISHERS) LTD. London,1961. £1 10s. 0d. [EC/139]

Book Reviews : Sewage Treatment: basic principles and trends,by Ronald Lomax Bolton,A.M.C.T.,M.R.S.H.,M.INST.S.P.,M.I.P.H.E.,and Louis Klein,M.SC.,PH.D. (LOND),F.R.I.C.,M.INST.S.P. 161 pp. BUTTERWORTH AND CO. (PUBLISHERS) LTD. London,1961. £1 10s. 0d. [EC/139]